CN111342886B - Route control method suitable for satellite network user to remotely access ground network - Google Patents
Route control method suitable for satellite network user to remotely access ground network Download PDFInfo
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- CN111342886B CN111342886B CN202010185687.6A CN202010185687A CN111342886B CN 111342886 B CN111342886 B CN 111342886B CN 202010185687 A CN202010185687 A CN 202010185687A CN 111342886 B CN111342886 B CN 111342886B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18584—Arrangements for data networking, i.e. for data packet routing, for congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/12—Shortest path evaluation
Abstract
The invention relates to a route control method suitable for a satellite network user to remotely access a ground network, and belongs to the technical field of satellite communication. The invention realizes the routing interconnection and service intercommunication between the satellite user and the ground network user by deploying the routing mapping server and the routing agent equipment and designing the routing mapping, address conversion and the like between the satellite network user and the ground network user. The invention can be applied to the scene that the satellite network user remotely accesses the ground network and is intercommunicated with the service of the ground network user, and realizes the service intercommunication between the satellite network user and the ground network user through a plurality of gateway stations on the basis of keeping the original satellite network and ground network routing system and the isolation between the satellite routing and the ground routing.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a route control method suitable for a satellite network user to remotely access a ground network, which can be used for realizing service intercommunication between the satellite network user and the ground network user under the condition of keeping the original satellite network and ground network route switching system and the isolation of a satellite route and the ground route.
Background
With the increase of the internet service demand in remote areas, on the sea, in the air and other global areas, the complementary type of the satellite network and the ground network in the aspects of coverage area, mobile access and the like is utilized to build a world-ground integrated information network covering the whole world, which not only becomes the development trend of the internet in the future, but also is an important project of the scientific and technological innovation 2030 in China. The space-ground integrated information network is a fusion network of a space satellite network and a ground network, wherein the ground network comprises the Internet and a mobile communication network, and the space satellite network comprises a plurality of satellite systems consisting of high, medium and low orbit satellites.
The satellite network is used as an access link of the ground network, remotely accesses the satellite network user to the ground network, and realizes service intercommunication with the ground network user, and is one of important application modes of integration of the satellite network and the ground network. In this mode, the interdomain routing protocol BGP is typically used to achieve redistribution and seamless convergence of routes between the satellite network and the terrestrial network. The topology of the satellite network changes frequently, BGP route updating is triggered frequently, and the satellite network and the ground network are unstable. Meanwhile, the ground network has the problems of huge routing table scale and the like, and if the routing information is directly redistributed into the satellite network, the satellite network with limited resources is difficult to bear.
Disclosure of Invention
In view of the above, the present invention provides a route control method suitable for a satellite network user to remotely access a ground network, which can be used in an application scenario where a satellite network user is remotely accessed to a ground network as an access link, and realizes service intercommunication between the satellite network user and the ground network user under the condition that an original satellite network and ground network route switching system and isolation of a satellite route and the ground route are maintained.
In order to achieve the purpose, the invention adopts the technical scheme that:
a route control method suitable for satellite network user to remotely access ground network, wherein, the satellite network is used as the access link of the ground network, and the remote user is accessed to the ground network and realizes service intercommunication with the ground network user; the satellite network comprises a satellite network user, a user station satellite terminal, a satellite-borne route exchange device, a gateway station satellite terminal and a satellite network route agent device, the ground network comprises a ground network user, an access router, a ground network route agent device, a ground backbone network and a route mapping server, and the method comprises the following steps:
A. satellite network adopts satellite label switching system, user station satellite terminal, gateway station satellite terminal and satellite carried route switching equipment interact satellite label routing information, generate satellite network user routing information including satellite label mapping table and satellite label forwarding table; the gateway station satellite terminal sends the satellite network user routing information to the connected satellite network routing agent equipment;
B. the ground network adopts an IP route switching system, the router of the ground backbone network and the access router exchange OSPF route information to generate the user route information of the ground network comprising an IP route forwarding table; the access router sends the routing information of the users of the ground network to the routing agent equipment of the connected ground network;
C. the satellite network routing agent equipment connected with the gateway station satellite terminal sends satellite network user routing information and the IP address of the gateway station satellite terminal to the routing mapping server, and the ground network routing agent equipment connected with the access router sends the ground network user routing information and the IP address of the access router to the routing mapping server; the route mapping server maintains a mapping table of satellite network user route information, ground network user route information and ground network IP addresses;
D. when the satellite network user visits the ground network user, the addressing process of the data packet is as follows: after the satellite network user data packet reaches the user station satellite terminal, the user station satellite terminal selects a gateway station satellite terminal according to a satellite network routing strategy, encapsulates a satellite link frame and a satellite label and sends the satellite link frame and the satellite label to the gateway station satellite terminal; the gateway satellite terminal recovers the original IP data packet, and sends the request information of the IP address of the access router to the route mapping server through the satellite network route proxy equipment according to the destination IP address of the data packet;
the route mapping server inquires a mapping table of the route information of the users of the ground network and the IP address of the access router according to the destination IP address in the request message, and if a corresponding item is found, the IP address of the access router corresponding to the users of the ground network is sent to the gateway station satellite terminal; the gateway station satellite terminal encapsulates the IP data packet and the IP address of the access router, and forwards the IP data packet and the IP address of the access router to the access router hop by hop according to a ground network routing strategy; the access router recovers the original IP data packet and forwards the original IP data packet to the ground network user;
E. when the user of the ground network visits the user of the satellite network, the addressing process of the data packet is as follows: after the user data packet of the ground network arrives at the access router, the IP address request message of the gateway satellite terminal is sent to the route mapping server through the route proxy equipment of the ground network according to the destination IP address of the data packet;
the route mapping server inquires a mapping table of route information of a satellite network user and an IP address of a gateway station satellite terminal according to a target IP address in the request message, and if a corresponding item is found, the route mapping server sends the gateway station satellite IP address corresponding to the satellite network user to the access router; the access router encapsulates the IP data packet and the gateway station satellite terminal IP address, and forwards the IP data packet and the gateway station satellite terminal IP address to the gateway station satellite terminal hop by hop according to a ground network routing strategy; recovering an original IP data packet by the gateway station satellite terminal, packaging a satellite link frame and a satellite label according to a satellite network routing strategy, and sending the satellite link frame and the satellite label to the user station satellite terminal; the user station satellite terminal recovers the original IP data packet and forwards the IP data packet to the satellite network user.
Furthermore, the user station satellite terminal and the gateway station satellite terminal maintain the mapping relation between the user IP address of the satellite network and the satellite label by operating a satellite label routing protocol; the user station satellite terminal and the gateway station satellite terminal package satellite data frames and satellite labels according to the destination IP address of the user service data packet and forward the satellite data frames and the satellite labels to the satellite-borne route switching equipment; after receiving the satellite data frame, the satellite-borne route switching equipment forwards the satellite data frame to a corresponding downlink port according to the satellite label.
Furthermore, the gateway station satellite terminal, the ground network route proxy equipment, the route mapping server and the access router are connected through a ground backbone network, and the IP address of the access router is planned and configured by the ground backbone network; the routing agent equipment sends the user routing information mapping to the routing mapping server at regular time, and if the routing information mapping is detected to be changed, the routing information mapping is immediately sent to the routing mapping server.
Further, in the step C, if the route mapping server detects that the mapping between the satellite network user route information, the ground network user route information and the ground network IP address changes, the route information mapping update is immediately sent to the corresponding gateway station satellite terminal and the access router.
Compared with the background technology, the invention has the following beneficial effects:
1. the invention can keep the original route exchange system of the satellite network and the ground network and realize the service intercommunication between the satellite network user and the ground network user under the condition of isolating the satellite route from the ground route.
2. The invention can make the service transmission path between the satellite network user and the ground network user switch between a plurality of gateway stations without sense.
In short, the invention realizes the routing interconnection and service intercommunication between the satellite user and the ground network user by deploying the routing mapping server and the routing agent equipment and by the design of routing mapping, address conversion and the like between the satellite network user and the ground network user. The invention can be applied to the scene that the satellite network user remotely accesses the ground network and is intercommunicated with the service of the ground network user, and realizes the service intercommunication between the satellite network user and the ground network user through a plurality of gateway stations on the basis of keeping the original satellite network and ground network routing system and the isolation between the satellite routing and the ground routing.
Drawings
Fig. 1 is a schematic view of an application scenario of a routing control method in an embodiment of the present invention;
FIG. 2 is a flow chart of routing map information interaction in an embodiment of the present invention;
fig. 3 is a flow chart of satellite network user and terrestrial network user service communication in an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A route control method suitable for satellite network users to remotely access a ground network is shown in an application scene of the method in figure 1. The satellite network comprises satellite network users, user station satellite terminals, satellite-borne route exchange equipment, gateway station satellite terminals and route proxy equipment, and the ground network comprises ground network users, access routers, route proxy equipment, a ground backbone network and a route mapping server. The satellite network is accessed to the ground network through the gateway station satellite terminal.
As shown in fig. 2 and 3, the method comprises the following steps:
A. the satellite network adopts a satellite label switching system, and a user station satellite terminal, a gateway station satellite terminal and satellite-borne route switching equipment interact satellite label routing information to generate a satellite label mapping table and a satellite label forwarding table. And the gateway station satellite terminal sends the satellite network user routing information to the connected routing agent equipment.
And B, the user station satellite terminal and the gateway station satellite terminal in the step A maintain the mapping relation between the user IP address of the satellite network and the satellite label by operating a satellite label routing protocol. And the user station satellite terminal and the gateway station satellite terminal package satellite data frames and satellite labels according to the destination IP address of the user service data packet and forward the satellite data frames and the satellite labels to the satellite-borne route switching equipment. After receiving the satellite data frame, the satellite-borne route switching equipment forwards the satellite data frame to a corresponding downlink port according to the satellite label.
B. The ground network adopts an IP route switching system, and the ground backbone network router and the access router exchange OSPF route information to generate an IP route forwarding table. The access router sends the routing information of the users of the ground network to the connected routing agent equipment.
C. Routing agent equipment connected with gateway satellite terminals sends satellite network user routing information and gateway satellite terminal IP address information to a routing mapping server, and routing agent equipment connected with access routers sends ground network user routing information and access router IP address information to the routing mapping server. The route mapping server maintains the mapping of the satellite network user, the ground network user route information and the ground network IP address information.
And C, the gateway station satellite terminal, the route agent equipment, the route mapping server and the access router are connected through a ground backbone network, and the IP address of the gateway station satellite terminal, the route agent equipment, the route mapping server and the access router is planned and configured by the ground backbone network. The routing agent equipment sends the user routing information mapping to the routing mapping server at regular time, and immediately sends the routing information mapping update to the routing mapping server if the routing information mapping is detected to be changed.
And C, the route mapping server detects that the mapping of the routing information of the satellite network user and the ground network user and the IP address information of the ground network is changed, and immediately sends the routing information mapping update to the corresponding gateway satellite terminal and the access router.
D. When the satellite network user visits the ground network user, the addressing process of the data packet is as follows: after the satellite network user data packet reaches the user station satellite terminal, the user station satellite terminal selects the gateway station satellite terminal according to the satellite network routing strategy, encapsulates the satellite link frame and the satellite label and sends the satellite link frame and the satellite label to the gateway station satellite terminal. And the gateway station satellite terminal recovers the original IP data packet and sends the IP address request information of the access router to the route mapping server through the route proxy equipment according to the destination IP address of the data packet.
E. And the route mapping server inquires a mapping table of the route information of the users of the ground network and the IP address of the access router according to the destination IP address in the request message, and if a corresponding item is found, the IP address of the access router corresponding to the users of the ground network is sent to the gateway station satellite terminal. And the gateway station satellite terminal encapsulates the IP data packet and the IP address of the access router, and forwards the IP data packet and the IP address of the access router to the access router hop by hop according to a ground network routing strategy. The access router recovers the original IP data packet and forwards the IP data packet to the ground network user.
F. When the user of the ground network visits the user of the satellite network, the addressing process of the data packet is as follows: after the user data packet of the ground network arrives at the access router, the IP address request message of the gateway satellite terminal is sent to the routing server through the routing agent equipment according to the destination IP address of the data packet.
G. And the route mapping server inquires a mapping table of the route information of the satellite network user and the gateway station satellite terminal IP address according to the destination IP address in the request message, and if a corresponding item is found, the gateway station satellite IP address corresponding to the satellite network user is sent to the access router. And the access router encapsulates the IP data packet and the gateway station satellite terminal IP address, and forwards the IP data packet and the gateway station satellite terminal IP address to the gateway station satellite terminal hop by hop according to a ground network routing strategy. And the gateway station satellite terminal recovers the original IP data packet, encapsulates the satellite link frame and the satellite label according to the satellite network routing strategy and sends the encapsulated satellite link frame and the encapsulated satellite label to the subscriber station satellite terminal. The user station satellite terminal recovers the original IP data packet and forwards the IP data packet to the satellite network user.
The method adopts the design of deploying the route mapping server and the route agent equipment, and realizing the effective integration of the satellite network and the ground network, the route interconnection and the service intercommunication of the satellite user and the ground network user, and the route mapping, the address conversion and the like of the satellite network user and the ground network user.
In a word, the invention originally creates a route control method suitable for the satellite network user to remotely access the ground network, which can be used in the scene that the satellite network user remotely accesses the ground network and is in service intercommunication with the ground network user, and realizes the satellite network user to land through a plurality of gateway stations and to be in service intercommunication with the ground network user on the basis of keeping the original satellite network and ground network route system and the isolation of the satellite route and the ground route.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the above embodiments, or equivalent substitutions and modifications may be made to other features of the embodiments, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A route control method suitable for satellite network user to remotely access ground network is characterized in that the satellite network is used as an access link of the ground network, and the remote user is accessed to the ground network and realizes service intercommunication with the ground network user; the satellite network comprises a satellite network user, a user station satellite terminal, a satellite-borne route exchange device, a gateway station satellite terminal and a satellite network route agent device, the ground network comprises a ground network user, an access router, a ground network route agent device, a ground backbone network and a route mapping server, and the method comprises the following steps:
A. satellite network adopts satellite label switching system, user station satellite terminal, gateway station satellite terminal and satellite carried route switching equipment interact satellite label routing information, generate satellite network user routing information including satellite label mapping table and satellite label forwarding table; the gateway station satellite terminal sends the satellite network user routing information to the connected satellite network routing agent equipment;
B. the ground network adopts an IP route switching system, the router of the ground backbone network and the access router exchange OSPF route information to generate the user route information of the ground network comprising an IP route forwarding table; the access router sends the routing information of the users of the ground network to the routing agent equipment of the connected ground network;
C. the satellite network routing agent equipment connected with the gateway station satellite terminal sends satellite network user routing information and the IP address of the gateway station satellite terminal to the routing mapping server, and the ground network routing agent equipment connected with the access router sends the ground network user routing information and the IP address of the access router to the routing mapping server; the route mapping server maintains a mapping table of satellite network user route information and gateway station satellite terminal IP addresses and a mapping table of ground network user route information and access router IP addresses;
D. when the satellite network user visits the ground network user, the addressing process of the data packet is as follows: after the satellite network user data packet reaches the user station satellite terminal, the user station satellite terminal selects a gateway station satellite terminal according to a satellite network routing strategy, encapsulates a satellite link frame and a satellite label and sends the satellite link frame and the satellite label to the gateway station satellite terminal; the gateway satellite terminal recovers the original IP data packet, and sends the request information of the IP address of the access router to the route mapping server through the satellite network route proxy equipment according to the destination IP address of the data packet;
the route mapping server inquires a mapping table of the route information of the users of the ground network and the IP address of the access router according to the destination IP address in the request message, and if a corresponding item is found, the IP address of the access router corresponding to the users of the ground network is sent to the gateway station satellite terminal; the gateway station satellite terminal encapsulates the IP data packet and the IP address of the access router, and forwards the IP data packet and the IP address of the access router to the access router hop by hop according to a ground network routing strategy; the access router recovers the original IP data packet and forwards the original IP data packet to the ground network user;
E. when the user of the ground network visits the user of the satellite network, the addressing process of the data packet is as follows: after the user data packet of the ground network arrives at the access router, the IP address request message of the gateway satellite terminal is sent to the route mapping server through the route proxy equipment of the ground network according to the destination IP address of the data packet;
the route mapping server inquires a mapping table of route information of a satellite network user and an IP address of a gateway station satellite terminal according to a target IP address in the request message, and if a corresponding item is found, the route mapping server sends the gateway station satellite IP address corresponding to the satellite network user to the access router; the access router encapsulates the IP data packet and the gateway station satellite terminal IP address, and forwards the IP data packet and the gateway station satellite terminal IP address to the gateway station satellite terminal hop by hop according to a ground network routing strategy; recovering an original IP data packet by the gateway station satellite terminal, packaging a satellite link frame and a satellite label according to a satellite network routing strategy, and sending the satellite link frame and the satellite label to the user station satellite terminal; the user station satellite terminal recovers the original IP data packet and forwards the IP data packet to the satellite network user.
2. The method for controlling routing of a satellite network user remotely accessing a terrestrial network as claimed in claim 1, wherein: the user station satellite terminal and the gateway station satellite terminal maintain the mapping relation between the user IP address of the satellite network and the satellite label by operating a satellite label routing protocol; the user station satellite terminal and the gateway station satellite terminal package satellite data frames and satellite labels according to the destination IP address of the user service data packet and forward the satellite data frames and the satellite labels to the satellite-borne route switching equipment; after receiving the satellite data frame, the satellite-borne route switching equipment forwards the satellite data frame to a corresponding downlink port according to the satellite label.
3. The method for controlling routing of a satellite network user remotely accessing a terrestrial network as claimed in claim 1, wherein: the gateway station satellite terminal, the ground network route agent equipment, the route mapping server and the access router are connected through a ground backbone network, and the IP address of the access router is planned and configured by the ground backbone network; the routing agent equipment sends the user routing information mapping to the routing mapping server at regular time, and if the routing information mapping is detected to be changed, the routing information mapping is immediately sent to the routing mapping server.
4. The method for controlling routing of a satellite network user remotely accessing a terrestrial network as claimed in claim 1, wherein: in the step C, if the route mapping server detects that the mapping of the satellite network user route information, the ground network user route information and the ground network IP address changes, the route information mapping update is immediately sent to the corresponding gateway station satellite terminal and the access router.
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| CN113014487B (en) * | 2021-02-25 | 2021-11-09 | 中国电子科技集团公司第五十四研究所 | Central control-based PIM-DM multicast label routing method |
| CN112968835B (en) * | 2021-02-25 | 2021-11-09 | 中国电子科技集团公司第五十四研究所 | Unicast label routing design method suitable for space-based network |
| CN113014496B (en) * | 2021-02-25 | 2021-12-17 | 中国电子科技集团公司第五十四研究所 | Central control-based PIM-SSM multicast label routing method |
| CN112995033B (en) * | 2021-02-26 | 2022-08-30 | 中国电子科技集团公司第五十四研究所 | Space-based network satellite-ground integrated exchange method based on labels |
| CN113824640B (en) * | 2021-09-06 | 2023-04-28 | 天地信息网络研究院(安徽)有限公司 | Satellite network label switching method for complexity in satellite |
| CN114070382B (en) * | 2021-11-11 | 2022-11-11 | 中国电子科技集团公司第五十四研究所 | Multi-network system routing method for satellite user |
| CN115065397A (en) * | 2022-05-18 | 2022-09-16 | 亚太卫星宽带通信（深圳）有限公司 | System and method for payment by using semi-open satellite network without mobile network |
| CN117440467A (en) * | 2022-07-13 | 2024-01-23 | 华为技术有限公司 | Communication method, communication device and communication system |
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